An entomologist is a scientist who studies INSECTS. They specialize in the behavior, structure, physiology, classification, and distribution of INSECTS. Entomologists may also study other arthropods such as spiders, mites, and centipedes. The two crossword solutions for the term ENTOMOLOGIST SUBJECT are INSECTS (7 letters) and INSECT (6 letters). This indicates that the primary focus of an entomologist is the study of INSECTS.